What will be returned if we call f(3)? const f = (x, y = true) => x * y; 

What's true about the document object in any environment?

What will be logged in the console? let a = { [ 'foo_' + (() => 1)() ]: 2 }; console.log(a);

What is the Promise?

How many yield keywords can be used in function* functions?

What does let mean in JavaScript?

What is the value of 'x' after the following code runs? var x; x++;

What is the value of c? var a = function(){ this.b = 1; } var b = function(){ this.b = new a().b; return 5; } var c = b() + new b();

What's the output? var test = function (firstName, surname) { this.Name.FirstName = firstName; this.Name.Surname = surname; } test.prototype = { Name: { FirstName: undefined, Surname: undefined } } var b = new test('john', 'doe'); var c = new test('bob', 'templeton'); console.log(b.Name.FirstName + ' ' + b.Name.Surname + ', ' + c.Name.FirstName + ' ' + c.Name.Surname);

What does the following return? Math.max();

Consider the following variable assignments: var a = 1; var b = 2; var c = 3; var r = a & b & c; The value of r is: